Furnace wall



Sept. 4, 1934. c. E. LUcKE 1,972,100

FURNACE WALL Filed Sept. 9. `v1930 3 Sheets-Sheet l gil? ATTORN EYS ll Il l f d? ATToRNE Sept. 4, 1934.

c. E. LUcKE FURNACE WALL Filed sept. 9, 19:50

3 Sheets-Sheet 2 I .anidl Zay 7,

we?? INVENTOR /J Sept. 4, 1934. c. E. LUcKE 1,972,100

FURNACE WALL Filed Sept. 9, 1930 3 Sheets-Sheet 3 Patented Sept. 4, 1934 UNITE STATES PATENT OFFICE FURNACE WALL poration of Delaware Application September 9, 1930, Serial No. 480,663

15 Claims.

This invention relates to a furnace wall that comprises tubes in two rows with the tubes in each row staggered with respect to the tubes in the other row and having the tubes held in position with respect to each other by means of clamps.

The invention will be understood from the description in connection with the accompanying drawings in which Fig. 1 is a vertical section through a portion of a wall illustrating the invention; Fig. 2 is a view along the line 2-2 of Fig. 1; Fig. 3 is a section along the line 3-3 of Fig. 1; Fig. 4 is a section showing the tubes at the corner of a furnace; Fig. 5 is a vertical section showing a modification; Fig. 6 is a view along the line 6 6 of Fig. 5; Fig. 7 is a section along the line 7 7 of Fig. 5; Fig. 8 is a plan view, partly broken away, showing a corner of the furnace in which the tubes are horizontal; Fig. 9 is a sec- 20 tion along the line 9--9 of Fig. 8; Fig. 10 is a plan view showing a corner for horizontal tubes extending into vertical headers; Fig. 11 is a section along the line 11-11 of Fig. 10 and Fig. 12 is a side view on an enlarged scale along the line 12-12 of Fig. 10.

In the drawings reference characters 1 and 2 indicate two rows of tubes, the major portions of each tube 2 being farther inside the furnace than the tubes 1, with the tubes 1 and 2 staggered with 30 respect to each other. The ends of the tubes l and 2 are bent to enter an upper header 3 and lower header 4 along two rows of holes.

Bolts 5 with threaded ends are welded to the tubes 2 in staggered positions and extend beyond the outer surfaces of the tubes 1. The bolts 5 extend through holes in clamps 6 that are longer than the distances between pairs of tubes 1 and are provided with curved ends 7 to extend partly around the tubes 1. When the nuts 8 on the bolts 5 are tightened the tubes 1 and 2 are clamped in contact with each other, the tubes 1 being prevented from spreading apart by the clamps 6 and the bolts 5 pulling the tubes 1 toward the clamps 6 and tending to force the tubes 1 outwardly. By placing the clamps 6 in staggered relation to each other a continuous and strong, but flexible, wall is provided.

Some of the clamps 6 have holding members 9 attached thereto as by Welding, for example. The holding members 9 are held in position by the structural supporting members 10 with wedges 1I passing through the holding members 9 to keep the same in place on the structural members 10.

A corner of the furnace is shown in Fig. 4 with vertical tubes 1 and. 2 in contact with each other.

A tube 13 that may be regarded as the lastl one of the tubes 1 at the corner is common to the rows l along adjacent walls and forms with tubes 2 of adjacent walls a triangle. One set of the clamps 6 for each wall terminates at the corner and the other set begins in each wall at the next tube numbered l.

In the modification shown in Figs. 5, 6 and 7 the tubes 1 and 2 are spaced apart with blocks 14 between the tubes 1 and 2. Each block 14 has a curved surface l5 bearing against a tube 2 and a curved surface 16 forming a lip bearing against a tube 1. rIhe clamps 6 and bolts 5 draw the curved surfaces 16 of the blocks 14 against the tubes 1 and the blocks 14 keep the tubes 2 in place. The blocks 14 also form a substantially continuous Wall along the sides of the furnace. The clamps 6 in this modification are longer than those in Figs. 1, 2 and 3 and two of the bolts 5 extend through each clamp 6.

In the modification shown in Fig. 8 the tubes 1 and 2 are horizontal and are provided with a 90 curve at the corners of the furnace. An extra holding member 9 may be provided at the corner and connected to the bar 17 which is in turn connected to the supporting structure 10. In the modification shown in Figs. 10, 11 and 12 the tubes 1 and 2 are horizontal and are bent outwardly at the corners with the tubes 2 of adjacent walls in contact at the corner. The tubes 1 and 2 are bent at the ends to enter the vertical headers 18 and 19 along tworows of holes. The holding members 9 attached to the clamps 6 are supported by the supporting members 10. Blocks 20 (Fig. 1l) with curved sui'- faces to contact with the tubes 1- and 2 are installed in the spaces between the tubes, and blocks 21 are installed on the outside of the corner between the tubes 1 of adjacent walls.

I claim:

1. A furnace wall comprising two contacting rows of spaced tubes, the tubes in one row being staggered with respect to the tubes in the other row, and means tending to force the tubes in one row between the tubes in the other row, the tubes in one row receiving the thrust caused by said means on the other row.

2. A furnace wall comprising two contacting rows of spaced tubes, the tubes in one row being staggered with respect to the tubes in the other row, and means tending to force the tubes in one row between the tubes in the other row, the tubes in one row receiving the thrust caused by said means on the other row, said means being staggered on said tubes.

3. A furnace wall comprising two contacting rows of spaced tubes, the tubes in one row being staggered with respect to the tubes in the other row, and means tending to force the tubes in one row between the tubes in the other row, the tubes in one row receiving the thrust caused by said means on the other row, said means comprising a member extending across two tubes in a row.

4. A furnace wall comprising two contacting rows of spaced tubes, the tubes in one row being staggered with respect to the tubes in the other row, and means tending to force the tubes in one row between the tubes in the other row, the tubes in one row receiving the thrust caused by said means on the other row, said means comprising a member extending across two tubes in a row, and having ends extending partially around said tubes.

5. A furnace wall comprising two contacting rows of spaced tubes, the tubes in one row being staggered with respect to the tubes in the other row, and pressure members for forcing tubes in one row towards tubes in the other row, each one of said pressure members having curved ends extending across two tubes of one of said rows.

6. A furnace wall comprising two rows of spaced tubes each having` substantially the same number of tubes in it as the other one, the tubes in one row being staggered with respect to the tubes in the other row, and means for pressing each tube in each row between and against a pair of tubes in the other row.

7. A furnace Wall comprising two rows of tubes, the tubes in one row being staggered with respect to the tubes in the other row, andA means for keeping tubes in one row pressed against two tubes in the other row, said means comprising rods attached to tubes of one row and plates on the other sides of tubes of the other row.

8. A furnace wall comprising groups of three tubes, and clamps for maintaining the middleA tube of each group in contact with the other two, said middle tube being offset from the plane of the other two, and means for varying the tension on said clamps.

9. A'furnace wall comprising groups of three tubes, and clamps for maintaining the middle tube of each group in contact with the other two and preventing said tubes from spreading apart, said middle tube being offset from the plane of the other two, and means for varying the tension on said clamps. K l

10. A furnace wall comprising two rows of tubes spaced and staggered with respect to each other, the tubes in one row being of larger diameter than the spaces between tubes in the other row, and adjustable means forcing the tubes in one row into contact with the tubes of the other row. i

11. A furnace wall comprising two sets of tubes with tubes in each set contacting with tubes in the other set, clamping means for said tubes connected to one set of tubes and contacting with the other' set, said clamping means preventing the tubes in said sets from spreading apart, and

the tubes in one set being staggered with respect to the tubes of the other set.

12. In fluid heat exchange apparatus, a furnace wall including wall cooling tubes arranged along the wall in multiple vsets of three tubes with one tube of each set being common to that set andan adjoining set, and tube holders to prevent the outside tubes of each set from spreading part in the direction of the wall plane, parts of the tube holders acting upon the middle tubes of the sets to force the middle tubes toward positions between the outside tubes.

13. In a fluid heat exchange device, a xed -outer furnace wall, and an inner wall including fluid conducting tubes exposed to the heat of the furnace, means for tying the tubes into separate groups, means for tying the separate groups together to permit adjoining groups to have different movements in response to different heat exchange conditions in the apparatus, and holding devices distributed over the tube wall and having lost motion connections with the outer Wall.

14. In fluid heat exchange apparatus, a fixed outer furnace wall, and an inner furnace wallincluding fluid conducting tubes, clamps securing the tubes in their operative positions and resisting spreading of the tubes transversely/of the wall, and holding members movable with the clamps and having lost motion connections with the outer wall to maintain generally the integrity of the tube wall while permitting different portions of the same to move or ex with relation to the outer wall.

` 15. In uid heat exchange apparatus, a furnace wall including wall cooling tubes arranged along thewalln'nmultiple sets of three or more Vtub'e's'ft'vith one tube of each set being common to that set and an adjoining set, tube holders to prevent the outside tubes of each set from spreading apart in the direction of the wall plane, parts of the tube holders acting upon middle tubes of the sets to force those tubes toward positions between the outside tubes, the tube holders including spacing blocks in heat transfer relationship with the tubes.

CHARLES E. LUCKE. 

